Heat exchanger



Patented Nov. 24, 1931 UNITED STATES PATENT OFFICE CHARLES RINGGOLDEWING, OF TORONTO, AND THOMAS MONTGOMERY, OF SARNIA, ONTARIO, CANADA,ASSIGNORS TO STANDA.'R.D OIL DEVIEEOPMENT COMPANY, A

CORPORATION OF DELAWARE HEAT GER Application filed January 3, 1929.Serial No. 330,012.

This invention relates to improvements in heat exchange apparatus of thetype in which fluids flow through and about tubes arranged in so-calledbundles, banks or nests. Our

6' improvements comprise tube bundles which are arranged for easyremoval from the surrounding shell orcasing. The tubes are sweptthroughout their exterior by a stream of heat exchange fluid movingsubstantially at right angles to the tubes. The invention isparticularly useful in connection with the vacuum distillation ofhydrocarbon oils and it will be described in connection with that use,although by no means limited thereto.

.15 In the accompanaying drawings, Fig. 1 is a vertical longitudinalsection of a preferred type of our heat exchanger or condenser, thesection being taken on the line, I-I of Fig.

Fig. 2 is a top plan view of the equipment 1 shown .in Fig. 1;

Fig. 3 is a vertical transverse section on line TIL-III of Fig. 1.

Referring to the drawings, 1 denotes a shell preferably of cast iron,rectangular in crosssection, and supported at the top and bottom bysleeves 2 and 3, which are advantageously steel castings. These aresecured to the shell by rivets 3, by welding, or other suitable means.Sleeve 2 is closed by a cover 4 and sleeve 3 by a base 5. Y The coverand base are also preferably steel castings. They have flanges 6 and 7which match with flanges 6' and 7 on the sleeves 2 and 3. The matchedflanges are secured together by bolts or other removable means, notshown. Strengthening ribs 8 run transversely of cover 4. Similar ribs 9are provided in base 5 and form condensate basins 10, 11, 12 and 13therein. An outlet- 14 is provided in each of the basins.

Within the shell 1 are tube bundles 15, 16, 17 and 18 arranged in acompact row. It will be understood that a greater or less number of tubebundles may be used. The tubes cross-over connections 29 and 30 connectthe first compartment 19a 0 in each bundle are set in upper tube headersheaders 20 and 21, 21 and 22, respectively.

A pipe 31 connects with the end of header 22,

opposite from the cross-over connection.

Each bottom header has a central longitudmal partition 32, dividing theheader into chambers 23a, 23b; 24a,- 24b; 25a, 25b; 26a, 26?). Eachupper header has two longitudinal ribs 33 and 34 dividing the headerinto three chan1bers19a, 195,190; 20a, 20b, 20a; 21a, 21b, 210,- 22a,22b, 22c.

Shoulders 35 are formed on sleeve 2 and flanges 36 on the upper headersrest on the shoulders. The lower headers are not secured, but hangfreely in the shelL. The pipes 27, 28, 29, 30 and 31 are mounted so thatthey may be easily disconnected. When this is done, any tube bundle canbe readily lifted out of the shell when required and replaced with a newone. I

Plates 37 having a number of relatively large perforations 38 thereinare placed between the tube bundles and preferably extend from end toend of the same. The plates are secured by riveting, or thelike, tostrips 39 attached to the shell and'have enlarged bottoms which rest onribs 9. Lar e rectangular openings 40 and 41 extend near y to the topand bottom of .the shell on opposite sides of the same. Castings 42 and43 are secured to the shell about the margins of these openings. It willbe understood that suitable vapor connections (not shown) are attachedto the castings 42 and 43.

In one mode of operating the heat exchanger, relatively cool oil isumped into header 19 through pipe 27, the oil flows down' throu h thefirst section'of tubes in the tube bun le 15 and enters the firstcompartment 23a in the bottom header 23. The oil then flows upwardthrough the second group .of tubes in tubebundle 15 into theintermediate com-' partment 19b of header 19, thence downward throughthe third groupof tubesinto the. a second compartment 23b of the bottomheadof the bundles and the oil is finally discharged through pipe 31.

Vapors to be condensed or cooled enter through the rectangular opening40 and flow in a substantially horizontal direction across the tubebundles. The plates 37 between the bundles serve to strengthen thestructure. They are perforated throughout thei'rextent sufficiently topermit the vapors to flow readily through them. Condensates are drawnofi' through the openings 14 in the bottom casting 5. Any vapors-whichare not condensed pass out through the rectangular opening 41 to asecond condenser 01': the same type, or any other suitable equipment.

It will be understood that the. invention is not limited to theparticular method of connecting the tube bundles nor to the use of oilas a cooling medium. If desired, two or more diflerent cooling media maybe used in the same exchanger.

Various changes and alternative arrangements may be made within thescope of the.

appended claims, in which we desire to claim shell, separate tubebundles disposed in the shell and each including groups of substantlally parallel tubes connected at opposite ends in series, theconnection at one end of the bundle being a chambered header, pipeswithin the shell detachably connecting the headers in series andincluding an inlet and an outlet for the series, a portion of the shellopposite the headers being detachable to permit removal of the bundles,means for assing fluid through the shell exteriorly o the tube bundles,and substantially uniformly perforated lates extending across the shellbetween ad Oining bundles transversely of the path of the fluidthroughout substantially the extent of the bundles whereby channellingof the fluid is prevented.

CHARLES RINGGOLD EWING. THOMAS MONTGOMERY.

all novelty inherent in the invention as I broadly as the prior artpermits.

We claim: 7 v

1. Heat exchange equipment comprising a shell rectangular in crosssection, tube bundles arranged vertically therein, rectangular fittingson opposite sides of the shell and adapted for connection to vaporlines, said fittings having substantially the same verticalcross-sectional area as said tube bundles, and perforated platesseparating the tube bundles without substantially impeding the flow ofthe vapors.

2. Heat exchange equipment comprising a shell, separate tube bundles disosed in the shell and each including groups 0 substantially paralleltubes connected at opposite ends in series, the connection at one end ofthe bundle being a chambered header, pipes Within the shell detachablyconnecting the headers in series and including an inlet and an outletfor the series, a portion of the shell opposite the headers beingdetachable to permit removal of the bundles, and means for passing fluidacross the exterior of the tube bundles.

3. Heat exchange equipment comprising a shell, shoulders within andspaced from the upper end of the shell, separate tube bumdles disposedin the shell and each including groups of substantially parallel tubesconnected at opposite ends in series, the connection at the upper end ofthe bundle being a chambered header supported by the shoulders Withinthe shell, the lower end of each tube bundle being suspended freelywithin the shell, pipes within the shell detachably connecting theheaders in series and including an inlet and outlet for the series, apor-. tion of the shell opposite the'headers being detachable to permitremoval of the bundles,

